Joe Kelley created HADOOP-10309:
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Summary: S3 block filesystem should more aggressively delete
temporary files
Key: HADOOP-10309
URL: https://issues.apache.org/jira/browse/HADOOP-10309
Project: Hadoop Common
Issue Type: Improvement
Components: fs/s3
Reporter: Joe Kelley
Priority: Minor
The S3 FileSystem reading implementation downloads block files into a
configurable temporary directory. deleteOnExit() is called on these files, so
they are deleted when the JVM exits.
However, JVM reuse can lead to JVMs that stick around for a very long time.
This can cause these temporary files to build up indefinitely and, in the worst
case, fill up the local directory.
After a block file has been read, there is no reason to keep it around. It
should be deleted.
Writing to the S3 FileSystem already has this behavior; after a temporary block
file is written and uploaded to S3, it is deleted immediately; there is no need
to wait for the JVM to exit.
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